iii) Refer to the textbook of environmental studies of standard 4th and read the passage given on page number 135 and 136 and answer the following questions. From the passage, find and classify the modes of communication and transport.
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The mass in grams of 6.022×1023 atoms of oxygen is 16 grams. Because 6.022×1023 is avagadro number. Avagadro number of particles are equals to the weight of its molecular weight. So atomic weight of 6.022×1023 atoms of oxygen is 16 which is the atomic weight of oxygen.
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